664635341322436 has 72 divisors (see below), whose sum is σ = 1279607206437560. Its totient is φ = 301836395520000.

The previous prime is 664635341322367. The next prime is 664635341322479. The reversal of 664635341322436 is 634223143536466.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8273999119936 + 656361342202500 = 2876456^2 + 25619550^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3286902136 + ... + 3287104336.

Almost surely, 2^{664635341322436} is an apocalyptic number.

It is an amenable number.

664635341322436 is a deficient number, since it is larger than the sum of its proper divisors (614971865115124).

664635341322436 is a wasteful number, since it uses less digits than its factorization.

664635341322436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208277 (or 208264 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 58.

The spelling of 664635341322436 in words is "six hundred sixty-four trillion, six hundred thirty-five billion, three hundred forty-one million, three hundred twenty-two thousand, four hundred thirty-six".